Wiseair WAFS-103 User manual

User Manual
2021 Release 2
WiseAir Technologies India LLP
[e-mail] [phone]
User
Manual for
Differential
Pressure
Pitot Tube
Flow Meter
WAFS - 103
WAFS 103 DIFFERENTIAL
PRESSURE PITOT TUBE FLOW METER
Page 1 of 32
MEASURE TO MANAGE

User Manual
2021 Release 2
WiseAir Technologies India LLP
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WAFS 103 DIFFERENTIAL
PRESSURE PITOT TUBE FLOW METER
TABLE CONTENTS
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Section Contents Page No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
General Information
About WAFS-103 Differential Pressure Pitot Tube Flow Meters
What's in the Box?
Product Specifications
Installation - Mechanical
Installation - Electrical (Wiring)
Configuring Settings
Communication Settings
System Settings
Warranty
Calibration
Need Help
Technical Support
Commissioning Report
3
4
6
7
8
17
18
21
25
27
27
27
28
31

User Manual
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WAFS 103 DIFFERENTIAL
PRESSURE PITOT TUBE FLOW METER
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Section 1 : General Information :
1.1 Please read this user manual in full and carefully observe the notes and
instructions before and during installation, operation and maintenance. The manufacturer
cannot be held liable for any damage which occurs as a result of non-observance or
noncompliance with this user manual.
Should the device be tampered with in any manner other than a procedure which is
described and specified in this manual, the warranty is cancelled and the manufacturer is
exempt from liability. The device is designed exclusively for the described application.
This user manual should be read carefully by the technician / qualified personnel and
the end user. Once you install, use or maintain this product, you accept that you have read,
understood and complied with this manual. This manual should be kept with the Flow Meter and
made available to relevant personnel as needed. WiseAir Endeavours to make changes to the
content of this Manual, and tries to ensure Correctness and well stated, but is not responsible for
Omissions or errors and the consequences caused thereby.
1.2 Compressed Air Safety
Any contact with quickly escaping air or bursting parts of the compressed air system
can lead to serious injuries or even death.
Do not exceed the maximum permitted pressure
Only use pressure tight installation material.
Avoid getting hit by escaping air or bursting parts.
The system must be pressure-less during maintenance work.
1.3 Electrical Safety
Any contact with energised parts of the product, may lead to an electrical shock which
can lead to serious injuries or even death.Consider all regulations for electrical installations.
The system must be disconnected from any power supply during maintenance work.
Any electrical work on the system is only allowed by authorised qualified personal.
1.4 Installing the Flow Meter, Calibration & Maintenance
The product must be installed properly and frequently calibrated, otherwise it may
lead to the wrong measurement values, which can lead to wrong results.
Always Observe the Direction of Flow When installing the Sensor. The
Direction is Indicated on the Housing.
Do Not Exceed the Maximum Operation Temperature at the Sensors Tip.
Avoid Condensation on the Sensor Element as this will affect the accuracy
enormously.
Please observe national regulations before/during installation and
operation.
Do not disassemble the product.
Always use a spanner to mount the product properly

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PRESSURE PITOT TUBE FLOW METER
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1.5 Using the Flow Meter
Do not use this product in explosive areas.
Do not exceed the permitted operating parameters. Any operation exceeding
these parameters can lead to malfunctions and may lead to damage on the
instrument or the system.
Do not exceed or go below the permitted storage and operation temperature
and pressure.
This product should be maintained and calibrated frequently, at least every
2 years.
1.6 Storage and transportation
Make sure that the transportation temperature of the sensor is between
-10°C to 60 °C.
Storage temperature of the sensor is between -10 °C to 50 °C and the
humidity is <90%, no condensation.
Avoid direct UV and solar radiation during storage.
Section 2 : About WAFS -103 Differential Pressure Pitot Tube Flow Meter
2.1 Importance of Flow Meters:
Flow meters are very popular for measuring compressed air systems. Depending on
where they are installed, flow meters can tell you the compressor output, system consumption,
peaks and troughs as well as average usage. When used well, flow monitoring can help keep
your system under control and highlight any unusual activity in your system.
Benefits of Monitoring Flow Include:
Improves system efficiency
Reduces system maintenance
Reduces operating and energy costs
Increases system understanding and operation
Identifies changes in system performance
Identifies non-productive air demand and leakage
Identifies peak and average demand
Different types of flow meters should be used depending on the specific location and
purpose. However, when it comes to compressed air, flow meters such as vortex or orifice plates
can create a pressure drop within the system, ultimately leading to increased operating cost of
the entire plant. As such, vortex or orifice plate flow meters are not recommended for
compressed air.

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2.2 Differential Pressure Pitot Tube Flow Meters
Pitot tube flow meters are ideally suited to wet, dirty and high velocity gases. The
extremely sensitive differential pressure measurement allows this sensor to be used over a wide
flow range. The patented anti condensation technology enables the sensor to be used under
saturated conditions and ensures the sensor will perform stable accurate measurements for
years to come.
Pitot tube flow sensor measures the upstream dynamic pressure and downstream
static pressure. The pressure differential is a measure of the velocity and flow rate.
Thanks to the online auto-calibration technology, high reliability, long-term
measurement and accuracy can be guaranteed.
Pitot flow meters are widely used in industrial processes, chemical, petrochemical,
power engineering, etc.
Pitot Tube flow meters are ideal for both temporary or permanent installations.
2.3 Key Features of Pitot Tube Flow Meters
Insertion type sensor
Ideal for wet and dirty gases Flow range of 5-300 Nm/s Note : below minimum
velocity flow meter reading will be zero
Patented anti condensation technology
Integrated pressure and temperature sensor
Online auto-calibration function to compensate for temperature and
pressure change
Easy to insert and remove through 1/2” valve, even when under pressure
Two output types as standard
Digital - Modbus RTU and
Analog— 4...20 mA + Pulse
Two shaft length options
250 mm or
400 mm
Suitable for pipes from DN25-DN300 provided minimum velocity
(>1L/minute) is maintained
Vibration proof
Low pressure drop
2.8" ultra-wide viewing angle LCD touch screen
Data logging with up to 10,000,000 recording points

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PRESSURE PITOT TUBE FLOW METER
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Section 3 : What's in the Box?
3.1 Each WAFS - 103 Flow Meter Unit comes with:
1WAFS - 103 Flow Meter
Power Adapter
2x5 Pin M12 Connector with
2 meter cable
User Manual
Connection Spanner
Stainless Steel Nipple
Calibration Certificate
Stainless Steel ½" Ball Valve
2
3
4
5
6
7
8
3.2 Optional Accessories
The following accessories are available for WAFS - 103 Flow Meter. Talk to your local
dealer for pricing and other accessories.
Y-type M12 connector for connecting multiple sensors
simultaneously via RS485
Smart Data Acquisition and Monitoring Software

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WAFS 103 DIFFERENTIAL
PRESSURE PITOT TUBE FLOW METER
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Section 4 : Product Specifications :

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PRESSURE PITOT TUBE FLOW METER
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4.1 Flow Range :
½
½
¼
Section 5 : Installation — Mechanical
Before installing the sensor, make sure it is rated for your system (refer to the
“Specifications” section above). We suggest purging the pipeline before installation to prevent
impurities from damaging the flow meter or blocking the pressure pipe.
WARNING!
Incorrect installation can damage the sensor or cause it to work incorrectly.
You need to maintain a minimum flow velocity of 5 Nm/S for the pitot tube to
work correctly. Below this minimum velocity, the flow meter reading will be
zero.
5.1 Step 1 - Find a Suitable Section of Horizontal Pipe
The Sensor Must be Installed:
on a horizontal pipe
upright, at 90° (+15°) to the pipe (ie vertically),
away from bends, edges, seams, changes in pipe size and other obstructions
(see Step 2 below)
after the first filter or water separator (ie the sensor can not be installed directly
on the outlet of the compressor)
Make sure the insertion location has enough room above the pipe to install the
sensor. If installing the sensor outdoor, protection from sun and rain is necessary.

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PRESSURE PITOT TUBE FLOW METER
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5.2 Installing the Pitot Tube Flow Meter on the Compressor Outlet
Non-Condensing gases - The pitot tube can be installed on the outlet of
compressors
Condensing gases - The pitot tube can not be installed directly
on the outlet of compressors.
If you want to install the pitot tube near the outlet of a compressor, a water separator or
filter is required to reduce the condensed liquid in the gas.
5.3 Install Vertically To Pipe
The sensor must be installed upright, at 90° +/- 15° (ie within 75° to 105° of vertical).
Installing the sensor at an angle can result in water accumulating in the shaft or head of the
sensor. This can damage the sensor and void the warranty.
5.4 Correct Installation

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5.5 Incorrect Installation
Do NOT install the sensor on a vertical pipe, upside down or at an angle, as
shown below.
Do NOT let water get into the shaft or head of the sensor as this can damage
the sensor or result in incorrect readings.
5.6 Step 2 — Choose Insertion location away from obstacles
To achieve and maintain the accuracy stated in the technical data, the sensor must be
inserted vertically, on a straight horizontal pipe section away from bends, edges, seams, curve,
changes in pipe size, control valves, etc. The sensor cannot be installed directly on the outlet of
the compressor.
For best results, choose a Iong , absolutely straight, horizontal section of pipe that is
free of obstructions. Pipe obstructions (eg bends, edges, seams, curve, changes in pipe size,
control valves, etc) change the velocity of compressed air / asses and/or create turbulence near
the obstruction. Placing the sensor too close to the obstruction will result in inaccurate readings.
Make sure that the insertion location has enough straight pipe on either side of the
sensor, as shown in the diagram on the next page.
WARNING! Inaccurate measurement may occur if the sensor is installed incorrectly
Pay careful attention to the distance between the sensor's inlet and outlet
sections and points of turbulence (eg bends, valves, etc)
Obstructions can cause counter-flow turbulence as well as turbulence in the
direction of the flow.
The sensor is for indoor use only. If installed in an outdoor installation, the
sensor must be protected from sun and rain.

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The figure below shows the minimum distances (in multiples of pipe diameters (DNs))
that the sensor must be installed away from bends, changes in pipe size and other obstructions.
The inlet side of the sensor must be at least 20 to 50 times the pipe diameter
way from the obstruction (depending on the type of obstruction — see figure
below).
The outlet side of the sensor must be at least 5 times the pipe diameter away
from the obstruction.
Correct Installation
Incorrect Installation

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Examples

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5.7 Step 3 - Fixing the Ball Valve on the Pipe:
To install the sensor, you need a ball valve or a nozzle with the following
specifications:
The inner thread must be G 1/2"
The diameter of the hole must be > 13mm, otherwise the shaft can not
be inserted into the pipe.

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5.8 Step 4 — Insert Sensor and Align Tip With the Centre of the Pipe
Place O-Ring on sensor shaft gland nut.
Screw the sensor into the valve, then open the valve.
OD
2
5.9 Step 5 - Insert Sensor and Align Tip With the Centre of the Pipe
Use the depth scale on the sensor shaft to
place the tip of the sensor in the middle
of the pipe.
Once the tip is in the centre of the pipe, tighten
the gland nut to hold the sensor in place.
The Insertion Depth = x + y = +y
OD = outer diameter of pipe
Y = ball valve height.

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Correct Installation
Incorrect Installation
The Sensor tip must be in the center of the pipe / tube.
Note : Inaccurate measurement may occur if the sensor is installed incorrectly.

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Example
5.10 Step 4 — Align the Sensor With Direction of Flow
The flow meter is not bidirectional. When installing and using the flow meter, please
pay attention to the direction of air flow and the alignment of the sensor.
The direction is flow is marked by 4 green arrows on the back of the
sensor and underneath the sensor.
Correct Installation
Incorrect Installation
The Sensor is aligned in the same direction as the gas flow.
Note : Inaccurate measurement may occur if the sensor is installed incorrectly
Use the alignment tool to align the sensor with the pipe. Ensure the arrows on the
sensor match the direction of flow.

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Section 6 : Installation - Electrical (Wiring)
The flow sensor is equipped with two M12 connector plugs - “A” and “B”. Cables are
connected to the sensor through the M12 connector plugs.
Do not screw the M12 connector using force. Otherwise, it may damage the
connection pins.

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Section 7 : Configuring Settings
Interface
The flow meter has a touch screen
interface.
Menu options
Settings
Data
Locked screen icon
To navigate the interface:
scroll up and down to see other
options
scroll left and right to see other
screens
Press an item to access that feature
Unlock the screen
The screen is set to automatically lock after
60 seconds. If the lock screen symbol is
present, press the symbol, hold and drag it to
the right of the screen.
You can chan e the timing for the
lock screen in the “Screen Settings" menu
(Settings > System Settings > Screen Setting)
Home Screen
Scroll left or right to
other screens
The home screen has three pages, as
shown by the three dots (...) at the bottom of
the screen. Move the screen left or right to
move between screens.
Menu Options
When you press the Menu icon a pop up
screen appears.
Press:
The Home icon ( ) to return to
the home screen
The Camera icon ( ) to take a
screen shot of that screen
The Notepad icon ( )to access
the Data Logging information
If you have a micro USB installed, press
the USB icon to safely remove the USB.

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MENU
Home
Settings
SUB MENU 1 SUB MENU 2 SUB MENU 3
Nor Flow Nor Velocity
Nor Consumption
Flow Temperature
Pressure
Pipe Diameter
Unit Setting
Normalization
ScreenShot
Logging Logging History
Gas Type
RS 485 Setting
Baud Rate
Parity
Flow unit
Velocity unit
Consumption unit
Temperature unit
Air Oxygen Nitrogen
Hydrogen Carbon Mono.
Carbon Dio. Sulfur Hexa
Argon Helium Methane
Nitrus Oxide Ethane
Propane Butane
Biogas Natural Gas
Pressure unit
Flow unit Prefix
3 3 3
M /h M /min M /s
I/min I/s CFM
Kg/h Kg/min Kg/s
1200 2400 4800 9600
14400 19200 38400
56000 57600 115200
None Odd Even
M/s ft/s
3
M/s ft Kg
o o
C F
Pa hPa kPa mPa
mbar bar PSI
Stop Bits 1 2
Response Delay
Device Address
Analog Setting
System Setting
4-20 MA Channel
4-20 MA Scaling Low
4-20 MA Scaling High
Pulse Output
Cubic meter/pulse
Screen Setting
System Information
System Update
Rotation Brightness
Screen Timeout
Flow Velocity Pressure
Temperature Nor Flow
Nor Velocity
Consumption Act - Consumption
Nor - Consumption
Velocity Offset Ratio
Velocity Filter Grad.
Anti Condensation
Constant Temperature
Pressure Calibration
Cutoff Velocity
New Password
Password Reset
Password
Advanced Setting

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Unit Measurement
To change the Unit of Measurements,
goto Settings ( ) > Unit Setting
Yo u c a n c h a n g e t h e u n i t s o f
measurement for
To change the units of measurement:
Select the desired unit of measure
Press the arrow ( ) to save your
setting and return to the previous screen.
Measure Units
Flow Nm3/h, Nm3/min, Nm3/s NI/min,
NI/s, Ncfm
Kg/h, Kg/min, Kg/s
Velocity Nm/s, Nft/s
Consumption m3, ft3, kg
Pressure Pa, hPa, kPa, Mpa
mbar, Bar
PSI
Temperature °C, °F
Gas type
To change the Gas type, go to
Settings ( ) > Gas Type.
To change the gas type:
Select the desired gas type
You might need to scroll up or
down to see all options
Press the arrow ( ) to save your
setting and return to the previous screen.
The flow meter is calibrated in air. If
you select another gas type, the flow meter
will automatically adjust its readings to
match the gas selected.
You can select from the following gas
types :
Air,
Argon (Ar),
Butane (C4C10),
Carbon Dioxide (CO2),
Carbon Monoxide (CO),
Ethane (C2H6),
Helium (He),
Hydrogen (H2),
Methane (CH4),
Nitrogen (N2),
Nitrous oxide (N2O),
Oxygen (O2),
Propane (C3H8),
Sulfur Hexafluoride (SF6).